New harmonized color code

Old color code   New color code: ...

NEMA Ratings and IP Equivalency Chart

NEMA Rating IP Equivalent NEMA Definition IP Definition   1 IP10 Enclosures constructed for indoor use to provide a degree of protection to personnel against incidental contact with the enclosed equipment and to provide a degree of protection against falling dirt 1 = Protected against...

IP Codes in accordance with IEC 529 & UL

There are several different uses of IP Codes, as described in IEC 529. IP Codes can have the following arrangement: ·         First character only, such as IP 3X ·         Second character only, such as IP X4 ·         Both characters, such as IP 34 The first...

UL 508 - The UL Safety Standard for Industrial Control Equipment

Industrial Control Equipment is a term commonly used to represent discrete components ranging from selector switches, relays, contactors, motor starters, timers, pilot lights, to complex system of these components. It encompasses more than 30 different product categories and 100 different devices (See Figure1).   Figure 1: Examples of industrial...

Motor protection

Overload relay with reclosing lockout They should always be used where continuous contact devices (two-wire control) are concerned (e.g. pressure and position switches), to prevent automatic restarting. The reset button can be fitted as an external feature in order to make it...

Earthing System TN-C-S

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Motor Control Diagrams

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Motor starters

Star-delta starter   This is the most popular and commonly used starting method for motor ratings > 4 kW (400 V).   • Electronic motor starter (EMS) and soft starter These enable the soft and low-noise starting of the motor. This eliminates interference producing current peaks and jerks during switching. The startup and deceleration phase...

Direct on line starter

Direct-on-line starter   In the simplest case the motor is connected directly with a contactor. The combination of motor protection and cable protection (fuse) is called a motor starter (MSC = Motor Starter Combination). By applying the full mains voltage to the motor windings, DOL starting may produce large starting currents which may result in troublesome...

CB Number of poles

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Standards

CE The CE conformity marking shall indicate conformity to all the obligations imposed on the manufacturer, as regards his products, by virtue of the European Community directives providing for the affixing of the CE marking.   When the CE marking is affixed on a product, it represents a declaration of the manufacturer or of his authorized representative that the product...

Standards

“Low Voltage” Directive 2006/95/CE The Low Voltage Directive refers to any electrical equipment designed for use at a rated voltage from 50 to 1000 V for alternating current and from 75 to 1500 V for direct current. In particular, it is applicable to any apparatus used for production, conversion, transmission, distribution and use of electrical power, such as machines, transformers,...